Which of these animals produces milk?
a. rainbow trout c. dove
b. carpenter ant d. gecko
C
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Which of the following is true of a flashback?
A. It produces a low whistle. B. When it occurs, the fuel valve should be closed first, followed by the oxygen valve. C. A flame is burning back inside the tip, torch, hose, or regulator. D. The valves should be closed slowly.
Good engineers don’t need strong time-management skills because others usually take care of scheduling.
a. True b. False
PROBLEM 3.14 In order to reduce the total mass of the assembly of Prob. 3.13, a new design is being considered in which the diameter of shaft BC will be smaller. Determine the smallest diameter of shaft BC for which the maximum value of the shearing stress in the assembly will not be increased. PROBLEM 3.13 Under normal operating conditions, the electric motor exerts a torque of 2.4 kN ? m on shaft AB. Knowing that each shaft is solid, determine the maximum shearing stress in (a) shaft AB, (b) shaft BC, (c) shaft CD.
In a starter, which component(s) contact the armature as it is turning?
A. brushes B. commutator C. plunger D. solenoid